Dr. Howard Whiner, a neurologist at Mass General Brigham who helped develop a nasal spray aimed at slowing Alzheimer’s, joins NewsNation to discuss new research suggesting lithium, long used to treat bipolar disorder,

Lithium is a metal found in some foods, drinking water, and in trace amounts in our bodies. It has long been used to treat some psychiatric disorders. But its potential role in protection against brain aging and Alzheimer’s disease opens up new doors for developing medicines that may finally provide an effective tool for fighting this dreaded brain-robbing disease,

This suggests being consistent with the MIND diet may reduce the risk of HS, dementia and Alzheimer's disease, the authors said. Foods in this diet typically include whole grains, nuts, legumes, berries, vegetables (especially leafy greens), olive oil, poultry and fish.